Using thermal UAV imagery to model distributed debris thicknesses and sub-debris melt rates on debris-covered glaciers

Loayza Muro, Raul Augusto; MacDonald, M.L.; Nienow, P.W.; Goldberg, D.N.; Wadham, J.L.; Wigmore, O.; Bisset, R.R.; Bingham, R.G.

dc.contributor.author	Bisset, R.R.
dc.contributor.author	Nienow, P.W.
dc.contributor.author	Goldberg, D.N.
dc.contributor.author	Wigmore, O.
dc.contributor.author	Loayza Muro, Raul Augusto
dc.contributor.author	Wadham, J.L.
dc.contributor.author	MacDonald, M.L.
dc.contributor.author	Bingham, R.G.
dc.date.accessioned	2023-10-09T17:09:20Z
dc.date.available	2023-10-09T17:09:20Z
dc.date.issued	2023
dc.identifier.uri	https://hdl.handle.net/20.500.12866/14248
dc.description.abstract	Supraglacial debris cover regulates the melt rates of many glaciers in mountainous regions around the world, thereby modifying the availability and quality of downstream water resources. However, the influence of supraglacial debris is often poorly represented within glaciological models, due to the absence of a technique to provide high-precision, spatially continuous measurements of debris thickness. Here, we use high-resolution UAV-derived thermal imagery, in conjunction with local meteorological data, visible UAV imagery and vertically profiled debris temperature time series, to model the spatially distributed debris thickness across a portion of Llaca Glacier in the Cordillera Blanca of Peru. Based on our results, we simulate daily sub-debris melt rates over a 3-month period during 2019. We demonstrate that, by effectively calibrating the radiometric thermal imagery and accounting for temporal and spatial variations in meteorological variables during UAV surveys, thermal UAV data can be used to more precisely represent the highly heterogeneous patterns of debris thickness and sub-debris melt on debris-covered glaciers. Additionally, our results indicate a mean sub-debris melt rate nearly three times greater than the mean melt rate simulated from satellite-derived debris thicknesses, emphasising the importance of acquiring further high-precision debris thickness data for the purposes of investigating glacier-scale melt processes, calibrating regional melt models and improving the accuracy of runoff predictions.	en_US
dc.language.iso	eng
dc.publisher	Cambridge University Press
dc.relation.ispartofseries	Journal of Glaciology
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.rights.uri	https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject	Debris-covered glaciers	en_US
dc.subject	melt – surface	en_US
dc.subject	remote sensing	en_US
dc.title	Using thermal UAV imagery to model distributed debris thicknesses and sub-debris melt rates on debris-covered glaciers	en_US
dc.type	info:eu-repo/semantics/article
dc.identifier.doi	https://doi.org/10.1017/jog.2022.116
dc.type.version	info:eu-repo/semantics/publishedVersion
dc.relation.issn	1727-5652